Improvement in slate-frames



'H.L. ANDREWS. Slate-Frame.

No. 213,028 Patentedwlar. 11,1879.

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'41".45 Ma/780%? v UNITED STATES PATENT EETcE.

HERBERT L. ANDREWS, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN SLATE-FRAMES.

Specification forming part of Letters Patent N0. 213,025, dated March11, 1879; application led April 9, 1878.

To all whom it may concern:

Be it known that I, HERBERT L. ANDREWS, ofChicago, Cook county, StateofIllinois, have invented a new and useful Improvement in Slates, ofwhich the following is a full description, reference being had to theaccompanying drawings, in which Figure l is a plan; Fig. 2, an endelevation; Figs. 3 and 4, enlarged details. Figs. 5, 6, and 'Z show amodilication oi' the method of application of noiseless material.

lt is customary to provide the edges of slateframes with cloth orsimilar material to render them noiseless; also, to provide the framewith a pencil-holder.

Heretot'ore the edges of the clothV have been left exposed, and when soleft it is liable to be loosened and displaced, either by accident or asthe result of use, or by the action of the pupil.

My invention consists in providing the frame of the slate with suitablegrooves to receive the edges of the cloth, or other similar material,and protect them from displacement, as hereinafter more fully set forth.

In the drawings, A represents a slate-frame. b is a strip or" cloth orsimilar suitable material, the edges of which are inserted into groovesc, as shown in Fig. 3. As shown in this figure, these grooves are out atan angle, and the ends of the cloth, when inserted in such grooves, arecompletely protected by the wood, so'that such edges cannot be displacedby ordinary use; and the pupil cannot, without much diiculty, loosen theedge of the cloth at any point.

I do not limit myself to the form of groove I shown in Fig. 3; neitheris it absolutely necessary that the wood protect the edges as perfectlyas shown in Fig. 3.

The cloth can be held in place in any suitable manner. Glue or asuitable cement may be used.

In Figs. 5, 6, and 7, I have represented one other form of carrying outmy invention in this respect, in which gures d is a narrow strip ofcloth upon the outer edge of the frame, the edges ofthe cloth being letinto grooves in the frame, and e c are strips upon the sides of theframe, the edges of the cloth being also let into the frame.

I do not regard this form as desirable as that shown in Fig. 3, becausethe edges of the cloth are not as well protected as in the other form,and there are more edges to be protected.

As represented, the noiseless material is not placed upon the ends ofthe frame, but the ends might be provided with such material.

When the noiseless material is placed over the edge of the frame, asshown in Fig. 3, I locate the grooves as near as may be to the outeredge ot the frame.

The inneredge of the frame is provided with a measure stamped on theframe, which has proved a desirable feature in use. In practice I usethe common measure on one side, and the decimal form on the other side.

What I claim as new, and desire to secure by Letters Patent, is asfollows:

A slate-frame provided with a continuous y groove or recess, incombination with a noise less material, the edges of said material beingsecured in the groove, substantially as and for the purpose set forth.

E. A. WEST, O. W. BOND.

